document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=831866>Question 831866</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A jet flew a distance of 4800 km. On the return flight, the speed was decreased by 200 km/h. If the difference in times was 2 hrs, what was the jets speed on the return flight </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #501697 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=501697\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ---<BR>\n" );
document.write( "s = d/t<BR>\n" );
document.write( "d = s*t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "outbound:<BR>\n" );
document.write( "4800 = st<BR>\n" );
document.write( "---<BR>\n" );
document.write( "return:<BR>\n" );
document.write( "4800 = (s - 200)(t + 2)<BR>\n" );
document.write( "4800 = st + 2s - 200t - 400<BR>\n" );
document.write( "---<BR>\n" );
document.write( "st = st + 2s - 200t - 400<BR>\n" );
document.write( "2s - 200t = 400<BR>\n" );
document.write( "---<BR>\n" );
document.write( "s = 4800/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "2s - 200t = 400<BR>\n" );
document.write( "2(4800/t) - 200t = 400<BR>\n" );
document.write( "9600/t - 200t = 400<BR>\n" );
document.write( "9600 - 200tt = 400t<BR>\n" );
document.write( "-200tt - 400t + 9600 = 0<BR>\n" );
document.write( "---<BR>\n" );
document.write( "the above quadratic equation is in standard form, with a=-200, b=-400, and c=9600<BR>\n" );
document.write( "---<BR>\n" );
document.write( "to solve the quadratic equation, by using the quadratic formula, copy and paste this:<BR>\n" );
document.write( "-200 -400 9600<BR>\n" );
document.write( "into this solver: https://sooeet.com/math/quadratic-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "the quadratic has two real roots at:<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = -8<BR>\n" );
document.write( "x = 6<BR>\n" );
document.write( "---<BR>\n" );
document.write( "the negative root doesn't fit the problem statement, so use the positive root<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = 6 hours<BR>\n" );
document.write( "---<BR>\n" );
document.write( "answer:<BR>\n" );
document.write( "speed outbound:<BR>\n" );
document.write( "s = 4800/6<BR>\n" );
document.write( "s = 800 kph<BR>\n" );
document.write( "speed on return:<BR>\n" );
document.write( "s = 4800/8<BR>\n" );
document.write( "s = 600 kph<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve systems of linear equations up to 6-equations 6-variables:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );